Finding the Fourth Proportional to 9,238.56, 12,749.28 and 5,047.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,238.56 : 12,749.28 = 5,047.20 : x
2. Step 2: Convert to fraction form
   9,238.56/12,749.28 = 5,047.20/x
3. Step 3: Cross multiply
   9,238.56x = 12,749.28 × 5,047.20
4. Step 4: Simplify right side
   9,238.56x = 64,348,166.02
5. Step 5: Solve for x
   x = 64,348,166.02/9,238.56
6. Step 6: Final answer
   x = 6,965.17